Elsewhere in this same forum someone asked why there is a need for separate forums . . .
Interesting idea. But I wouldn't limit it to arab/Israeli wars, I would open it to Middle Eastern conflicts to include Libya, Egypt Afghanistan, Lebanon, Israel, Syria, et all. Sounds interesting. And I agree that there is a lot of interest in those conflicts.
A short answer to your final question could be: half of the military hardware around the world comes from Russia/Soviet Union.